Air-circulating device.



WILLARD M. MQEWEN, F JHICAGO, ILLINOIS.

AIB-CIROULATING DEVICE.

11,214,199, Specmcan o ea wen Patented cease, aeia.

Application filed October 27, 1915. I Serial No. 58,198.

To all whom it may concern:

Be it known that I, WILLARD M. MoEwnN,

a citizen of the United States of America, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Air-Circa lating Devices, of which the following is a specification.

The main objects of this invention are to provide an improved electric fan arranged to swing or tilt back and forth simultaneously in two different planes; to provide improved mechanism "for positively tilting the rotating fan in one plane and thereby setting up gyratory forces which cause the fan to oscillate in the other plane; to provide an improved construction and arrangement of said mechanism whereby it is more readily and compactly concealed on the fan and is simpler and less expensive to manufacture than the mechanism shown in my copending applications Serial Nos. 29,129 and 40,397.

An illustrative embodiment of this invention is shown in the accompanying drawings, in which:

Figure 1 is a side elevation partly sec-- tional of an electric fan equipped with the improved mechanism. Fig. 2 is a front elevation partly sectional of the fan as viewed from the plane of the line A-A of Fig. 1.

Fig. 3 is an enlarged sectional detail of the cam mechanism taken on the line BB of Fig. 2.

In the construction shown in the drawings, the blower mechanism comprises a fan 1 connection to a motor 2 rotatably mounted in a casing 3 which is tiltably supported on a member or shaft 4 journaled in the supporting member or base 5.

The motor casing 3 is tiltably connected to shaft 4 by a lug 6 formed on the under side of the casing and connected to the bifurcated head 8 of said shaft by means of a pin 9. The shaft 4 is journaled on the base by means of an anti-friction bearin 10, and a suitable connection 11 is attache to the inner end thereof for securing it against longitudinal movement on the base 5.

The mechanism for tilting the fan in a vertical plane comprises a cam 12 and a horizontally disposed plane annular track 13 integrally formed on the base 5. The cam 12 is preferably an eccentric rigidly connected to a shaft 14, and has an antifriction roller rim 15 rotatably mounted thereon and resting directly upon the track 13. Ball bearings 16 are interposed between the cam 12 and the ring 15, so as to permit a free relative rotation of the cam and ring, as will hereinafter be described.

The cam shaft 14 is journaled on the lug 3 and a lug 17 spaced in front thereof, and 1s connected to the fan shaft 18 through the medium of a shaft 19. The shaft 19 is set at an angle in the motor casing 3 and carries at its upper end a gear 20 meshing with a worm 21 on the motor shaft 18 and carries at its lower end a worm 23 meshing with a gear 24 on the shaft 14.

The lug 17 is extended around the worm 23 and gear 24, so as to form a canopy 25 for concealing said wormand gear.

The present device employs the same principle of oscillation explained in the heroinbefore mentioned copending applications, wherein by tilting the axis of rotation of the fan in a vertical plane gyratory forces are brought into action which cause the fan to swing back and forth in a horizontal plane.

The tilting is effected by the rotation of the cam or eccentric 12 on the ring 15, and the ring being free the fan is permitted to swing horizontally first in one direction and then in the other. The fan reverses the direction of horizontal swinging whenever the vertical tilting is reversed the length of the swing, depending upon the rapidity with which the change in tilting occurs.

Although but one speclfic embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted without departing from the spirit of this invention as defined by the following claims.

I claim:

1. The combination of a support, a track thereon, blower mechanism tiltably mounted on said support, a cam carried by said mechanism and coacting with said track, and driving mechanism for causing the rotation of said cam whereby said blower mechanism is simultaneously tilted in a plane transverse to said track and rotated about the axis of said member.

2. In an air circulating device, the combination of a support, a track thereon, a member rotatably mounted on said support, blower mechanism tiltably mounted on said member, a cam carried by said blower mechanism and engaging said track, driving cam and track whereby the gyratory forces set up by the tilting of said blower mechanism are free to cause said blower mechanism to oscillate in a plane transverse to the tilting thereof.

3. In an air circulating device, the combination of a support, a horizontally disposed annular track integrally formed thereon, a member rotatably mounted on said support, blower mechanism tiltably mounted on said member, a cam carried by said blower mechanism and engaging said track, and driving mechanism connecting said cam with said blower mechanism so as to cause the rotation of said cam whereby said blower mechanism is simultaneously tilted in a lane transverse to said track and rotated a ut the axis of said member.

4. In an air circulating device, the combination of a support, a track formed thereon,

I a member rotatably mounted on said support, blower mechanism tiltably mounted on said member, a roller mounted to travel on said track, an eccentric carried by said roller, and driving mechanism connecting said eccentric with said blower mechanism.

5. In an air circulating device, the combination of a support, a track formed thereon, a member rotatably mounted on said support, blower mechanism-tiltably mounted on said member, an eccentric cam carried by said blower mechanism, a ring embracing said cam and engaging said track, anti-friction means interposed between said ring and cam, and driving mechanism connecting said cam with said blowerv mechanism.

6. In an air circulating device, the combination of a support, a track formed thereon, a member rotatably mounted on said support, blower mechanism, a lug on said blower mechanism pivotally connecting said blower mechanism to said member in position to be tilted in a plane transverse to said track, a shaft mounted on said blower mechanism substantially parallel with the axis of said blower mechanism, afcam carried by said shaft and engaging said track, and driving mechanism connecting said shaft inwardly of said cam with said blower mechanism so as to cause the rotation of said cam whereby said blower mechanism is simultaneously tilted in said transverse plane and rotated about the axis of said member.

7 7. In an air circulating device, the combination of a support, a horizontally disposed annular track thereon, a vertically disposed spindle journaled in said member, blower mechanism pivotally connected to said spindle on an axis transverse thereto, a roller mounted to travel on said track, an eccentric carried on said roller, and driving mechanism connecting said eccentric with said blower mechanism.

Signed at Chicago this 25th day of Oct. 1915.

WILLARD M. McEWEN. 

